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Restructuring (Tables)
9 Months Ended
Apr. 30, 2013
Restructuring and Related Activities [Abstract]  
Schedule of restructuring-related costs

              

                             
       

Balance at
July 31, 2012
(in 000's)

   

Expense
(in 000's)

   

Payments
(in 000's)

   

Balance at
April 30, 2013
(in 000's)

 
  Severance         $1,800         $859         $554         $2,105